Bluetooth: L2CAP: Fix accepting multiple L2CAP_ECRED_CONN_REQ

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Dahua software products 访问控制错误漏洞

Dahua software products are a family of applications from the Chinese company Dahua. A security vulnerability exists in several Dahua software products that stems from their unauthenticated MQTT credential requests that allow an attacker to obtain encrypted MQTT credentials which cannot be direct...